Tire boot



Dec-.9,1924 I 1,518,466

D. E.A sTEvENsoN4 TIRE BOOT Filed Dec. 29. 1920 lramal' Dec. 9, i924."

DONALD E. 1STEVZEEN'SOIN',l 0F ZIIINDIAN'APOLIS, DIDIANA.'

TIRE BOOT.

Applicatlorled December 29, 1920. Serial No. 483,854.

To all 'whom t may concern.

Be it known that I, DONALD E. STEVENsoN, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Tire Boots, of

which the following is a specification.

The vpresent invention relates to boots or patches forpneumatic tires, and consists of the combinations and arrangements of elements hereinafter described andparticularly set forth in the accompanying claims.

The purpose ofthe invention is to provide a re-enforced. boot or patch for pneumatic tires'tliat will not creep or chafe either the inner tube or the inside of the shoe or casing, and one whichl can `be readily applied to a tire and cannot be easily displaced therefrom.

' apparent from the following lspecification and claims, referencel being had to the accompanying drawing forming al part thereof, in which llike characters of reference designate similar parts inthe several views, of which: -I

Figure l is a view of the outsidev of the boot with a portion broken away to illustrate the manner of placing the layers of rubberized' cord fabric y Figure 2, a similar view of the inside of the boot showing a vcushioning pad in position;

Figure 3, a section on the line 3`3 of Figure 1; i

Figure, a section on the line 4 4 of Figure 1, and

Figure 5 a cross-section through the boot after having been vulcanized.

ln the drawings, the boot shown is constructed of several plies of rubberized cord fabric before being vulcanized, and it consists of a base piece 5 cut on the bias with the weave thereof disposed as indicated byv the dotted lines in Figure 1. On the oppositeends of the base piece 5 are vulcanized flaps 6 which project from said base piece as shown. A n intermediateJ ply 7 of relatively smaller dimensions is next placed in the center of the base piece and 1s cut parallel with the weave. A third ply 8 of the same `dimensions as the ply 5 is cut on'the bias and disposed at right-angles to said piece 5 and vulcanized to the edges thereof through the Haps 6, thereby forming a boot or patch having -the same -tensile strength in all directions. A l

Narrow strips 9 of the same material as the members 5, 7 and 8 are placed along the edges of the top ply 8 and the whole upper edge is bound with a narrow strip of unvulcanized rubber compound 10, and on the under side of the base piece 5 is placed a thick layer of unvulcanized rubber compound 11 to act as a protecting cushion.

The several parts of the article as thus assembled are formed on a mandrel, securely wrapped under pressure, and subjected to a vulcanizing process which produces a boot having relatively smooth inner and outer surfaces and providing a strong punctureproof atch or boot having the necessary vflexibillty for application to a tire. Other objects and advantages will become may. adopt such modifications or changes within the scope of the claims to better suit the end in view.

Having thus described my invention, what l claim as new and desire "to protect by United States Letters Patent is: j

l. As an article of manufacture a blowout patch composed of substantially coextensive fabric layers having an intermediate smaller fabric layer whose fibers extend at an angle to the fibres of the other layers, whereby a thickened portion is provided in the central region of the patch, substantially as set forth. l

2. .As an. article of manufacture a blowout patch comprising outside layers of fabric havingbetween them a centrally arranged smaller layer and attaching flaps secured between the-marginal portion of said outside layers, substantially as set forth.

3. The process of making a blow-out patc comprising arranging a pair of fabric pieces out on the bias wlth their weaves extending in different directions, a fabric piece between Asaid air of fabric pieces, flaps at the edges atch whereby the exterior and interior suraoes are rendered smooth in appearance, substantially a's set forth.

4.. The process of makingr a blowout patch comprises arranging inside and outside fabric pieces cut on their respective biases with their weaves extending substantially at right angles, a fabric iece between said inside and :outside pieces,

aps at the edges of one of said fabric pieces, strips of unvulcanized rubber at .the joints between the fabric vpiece and iaps, and a. sheet of raw rubber disposed against the vsurface of the inner fabric piece, and subjecting said patch to apvulcanizing process whereb the exterior and interiorsurfaces arel ren ered smooth in appearance, substantially as set forth.

5. The process of making a tire boot comprising arranging inside and outside fabric pieces cut on their respective biases with their weaves extending substantially' at right angles,a fabric piece between said inside and outside fabric pieces, flaps at the edges `of Y said fabric pieces,- strips of unvulcanized rubber at the joints between the fabric pieces and flaps, and a sheet of raw rubber 6. .The process of making a tire patch comprising arranging a base fabric piece and a co-dinensional overlying fabric piece cut on their respective biases with their weaves at right angles, a smaller fabric piece Ilocated between said fabric pieces, flaps secured between the opposite side edges of said base and (ao-dimensional fabric pieces, strips secured at the opposite marginal edges of the base fabric piece, a rubber ceinenting strip at the attached marginal edges of said flaps and strips, and a cushioning stripunderlying the medial portion of the base fabricy piece, assembling the whole on a mandrel. wrapped under pressure, and vulcanized whereby the completed patch is rendered smooth on its interior and exterior surfaces,

substantially as set forth.

In testimony whereof I affix my signature.

DON/ALD E. srEvENsoN. 

